I just noticed this hanging out under my car, it looks like a brake line or maybe a fuel line? I've also recently been having an intermittent misfire problem and it kills at idle when I fire it up, could that be a vacuum leak and could that be related to whatever this is hanging out under my car?

 

I'm guessing brakes, but hard to tell. Trace it, and see where it goes!

 

Looks like a fuel line to me - it's on the passenger side, looks like a fuel line, and appears to come down from the filter.

 

I would go with what he said

 

Lol^^^

 

Fuel line possibly.... But running next to it down the same side is the evap line.

Which could be why your light is on

 

whatever it is, stick it back up there,

a fuel line should not be dangling that low

 

Its actually on the driver's side and I tried sticking it back up but it is fairly ridgid, it doesn't want to go back into place.

 

man you better duct tape that **** or somthing back in place that **** get's snagged on a freaking rock or something and it will rip all that **** off trust me had the same thing happen when i had my integra but it was a fuel line that the idiot that had it before me placed in there and didnt secure it properly and just fell and it got caught on the a big *** pot hole and ther i go paying 200 buck's for a tow -__-

 

Looking at the door moldings it looks like passenger side in the one pic. If it's driver side it's not fuel or evap...